Thinking that, Luke quickly stripped Farby of his T-shirt, which had a gash in it, and washed away the blood on Farby's body.
The wound was healing at a visible rate.
Throwing the hoodlums into a stairwell in an apartment building not far away, Luke waited until the injury on Farby had basically disappeared before he put a cheap T-shirt on the guy.
After everything was done, he took off his uniform and put it away, before he walked out of the alley and returned to the venue.
Few people noticed Luke's return.
Except for the panic-stricken guard at the back door who was worried about his job, most people didn't know that he was a detective at all, much less that he had left and returned.
He found Selina, who was explaining the follow-up procedure for the case to the person in charge. He nodded at the person in charge, and Selina immediately ended the conversation and left.